Pump-regulator.



H. R. SETZ PUMP REGULATOR.

APPLICATION FILED JULY 11, 1914.l

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PUMP REGULATOR.

APPLIGATIOI FILED JULY 11, 1914.

1,1 1 6,494, Patented Nov. 10, 1914.

2 SHEETS*-SHEET Z.

l 'Q 'l u rr $2 G,

nf Lw mvenbox. Abbeab E r1.5. Setz il'olll whom, it may concern .Be itknown that l, llene R. Sn'rz'., a citi senof the United States ofAmerica, and a resident of the city of llt. Louis, State of Missouri,have invented certain new and useful Improvements in Pump-Regulators, ofwhich the following is a full, clear, and

exact description, reference being had to the, acconipanying drawings,forming ,a part of this specilication.

My invention relates toa re ulatng device adapted to, be associate withfuel pumps of internal combustion enginespf` the Diesel type, thepresent invention being an improvement on the pump regulatingdeviceshown in ll. S. Patent No.

1,076,915,- issued to the `Fulton llron Works (lot.v 28, 1913.V Thestructure shown in this prior patent includes a diaphragm dellecti blein response to pressure exerted by the liquid in a pump chamber' so asto vary the capacity of the pump chamber. 'lhc earlier' structure alsoincludes a non-yieldable stop member adjustably supported oppte thecentral portion of the diaphragm,and serv ing to limit the movements ofthe. diaphragm, the stop member being under the control. of an enginegovernor. The yieldable diaphragm changes in shape when it is deflectedto engage the rigid stop member, and since this inflexible stop membercan not assume the different shapes of the dia phragm, it does notabsolutely control the movement of said diaphragm.

rlhe object of the present invention is to provide' a flexible diaphragmstop adapted to be deflected to conform substantially to the shape ofthe diaphragm-when the latter is deflected, thereby positivelycontrolling the movement of the diaphragm. lWhile my new diaphragm stopis a deirible structure, it is preferably composed of a number of rigidsections which do not yield in response to the pressure exerted by thediaphragm.

.Figure l is a longitudinal section, partly in elevation, illustrating afuel pump provided with my regulating device. lfig'. lll is an enlargedvertical section showing the flesn ble di aphragm stop and the element-sassociated therewith. Figi lll is a fragmentary vieuy showing a portionof the diaphragm, the flexible diaphragm stop, and the yieldab'ledevicelocated between the diaphragm and the diaphragm stop. Fig. ll? isa de tpeciftcatlon of Letters lltateut.

npplcaton filed July 11,

Patented llov.. ld, llllll.a

mit. serial nu. asu/los.

the flexible diaphragm stop, p

l designates a pump cylinder, and 2 a plunger operable in said cylinder."lhe plunger 2 is designed to be driven by a shaft 3 forming part of aninternal combustion engine, said shaft 3 being provided with aneccentric d for driving a connecting Cross head 6 fixed to the pumpplunger 2. Afpump chamber 7 adapted to receive the plunger 2, isdesigned to receive -a supply of liquid fuel, for instance oil, and thefuel received by the pump chamber is forced therefrom to the cylinder ofan internal combustion engine, rlhe fuel to be forced to the enginepasses from a supply pipe 8 to an inlet chamber 9 adjoining the pumpchamber, and when the pump plunger moves on its suction stroke a suctionvalve l0 opens automatically to admit the fuel to the pump chamber i.During the power strolres'of theplunger, the valve 10 is forced. to itsseat by a spring 1l, as well as bythe pres sure of the fuel in thepump'chamber, and the discharge valve l2 opens to permit 'the flow offluid to the engine cylinder'. The plunger 2 partakes of a uniformmovement, the length of each stroke of the plunger being determined bythe movement` of the eccentric d. However, the volume of fuel dischargedfrom the pump chamber isregulated or .controlled by a governing deviceas willi-be presently described.

Adjacent to the pump chamber *l is a diaphragm chamber i3 communicatingwith the pump chamber through a port lll which permits theliquid fuelentering into the pump chamber to pass therefrom into said diaphragmchamber.

l5 designates a yieldable diaphragm see curely held at its margin by achambered member l@ secured to the pump structure and serving as a guidefor an adjusting 'rod li". The diaphragm l5 is adapted to be deflectedby the pressure of the fluid confined between the valves l() and l2during the power strokes of the plunger il, thereby enlarging the spacefor the fuel confined between said valves. lWhen the diaphragm isdeflected by the fluid pressure in the pump chamber some of the fuelescapes into the diaphragm chamber instead of passing out through thedischarge port lll, and the voltailfview of one of the segments whichform rod 5, and the latter being pivoted to a.

ume of Afuel to be discharged is regulated by limiting the movements ofthe diahragm 15, permitting a considerable deection of thediaphragm whenit is desired to decrease the fuel supply, and preventing the diaphragmfrom deiiecting When the p maximum, fuel supply is required.

The means for: regulating the movement;

f the diaphragml to' vary theV fuel supply,

in accordance with the load on the engine,

comprises a iiexible stop device larranged behind the diaphragm vandadapted to be deflected to provide an abutment conforming substantially`4tofthe shape of the diaphragm When thel latteris deflected'. 'The.flexible stop device preferably comprises series of segmentsl 2Oarranged in a circular chamber 21'at the inner 1end of the member 16,said segments being fitted. together to produce a substantiallycircularstop device'.

A The outerends of the segments areI litted be of any suitableconstruction. In the coni of the adjusting rod 17 to Walls of the'chamber 21 and' the' inner ends ot said segments 'are seated infanannular groove formed by collars 22and23 at Y lines Fig. ll, a portionof the fuel .displacedA by the pump plungeris forced into the diaphragmchamber 13 so 'as to enlarge said chamber by deecting the diaphragm tothe position seen in dotted lines, thereby permitting a portion of thedisplaced fuel to remain in the diaphragm chamberfinstead of passing outthrough thedischargeport 18. The deiectible stop device consisting ofthe rigid segments 20 roekably mounted in the chamber 21, is adaptedto'be deflected `through the medium of agovernor cooperable With the shaft3 hyftvhichth'e plunger 2 is driven, and said governor-fmay structionhereinillustrated, the governor includes a sleeve 31 slidable'longitudinally of the shaft 3, and said "sleeve has connected' to it alever 24 pivotally supported at 25 and connected to a slidable cam 26 bymeans of a link 27. The cam member 526 isprovided with a cam groovev 29adapted to receive a cam block 28 secured to the outer end The series ofsegmental stop members 20 surrounding the inner end of the adjusting rod17. may be deflected as previously 4pointed out to provide an abutmentface corresponding substantially to the shape of the diaphragm' when thelatter is deflected, and it is desirable to provide a substantiallysmoothabutment face, devoid of shape or projecting'corners which wouldWear away the adjacent face of the diaphragm. Therefore, if desired, ayieldable protector 31 may ybe interposed between the diaphragm and thesegmental stop members 20. The protectorl have shown is a'circularmember provided with a series of yieldable tongues Which preferablyoverlie the corners ofthe segmental stop members 20.

I claim y 1. Vlhecombination of a housing containing a pump chamber,means operable to force iiuid from said chamber, a deflectible .'phragmstop conformingV substantially to the shape'of said diaphragm.

2. The combination of a housing containt ing a pump chamber, ymeansoperable to force iiuid from said'chamber, a deectible diaphragmexposed4 to saidpump chamber, the diaphragm being changeable in shape inresponse to pressure exerted in said pump chamber, a deiiectible stopdevice for limiting the movements of said deectible diaphragm, said'deiiectible stop device being adapted to be deflected to provide anabutment conforming substantially to the sha e of the 'diaphragmwhen thelatter is efiected, and means for adjusting said deflectible stopdevice;Y i t 3'. The combination of a housing containing'a pumpfchamber, meansoperable to forceiliuid from said chamber, a deiiectble diaphra miexposed to said pump chamber, the diap ragm being changeable in shape inresponse to pressure exerted inv said pump i chamberfafdeflectible stopdevice for limiting the movements of said deiectible diaphragm',saidfdeflectible stop device com- .j prising a seriesof'movable-sections adapted to be' adjustedto fprovide an abutmentconforming.'substantially'to the shape of said diaphragm-Whenth'e latteris deflected, and means for ad'usting said sections.

a. The com ination of a housing contain-f ing a pump chamber, meansoperable tov force fluid from'said chamber, a deflectible diaphragmexposed to said pump chamber, 4

the diaphragm being changeable in shape in response to pressure exertedin said pump chamber, a deflectible stop device for limiting themovements'of said deflectible dia- 4phragm said deflectible stop devicecomprising a series of movable sections adapted to be adjusted toprovide an vabutment'conforming substantially to the vshape' of saiddiaphragm when the latterisdeiected, and

kmeans forv adjusting said sections, said la'iiaaai means iruzludingA anadjusting member `ntted to said sections.

The combination of a housing containing a pump chamber, means operableto force fluid from said chamber, a deflectible diaphragm exposed tosaid pump chamber, the 'diaphragm being changeable in shape in responseto pressure eirerted in said pump chamber, a. deflect-ibis stop devicefor limiting the movements 'of said deflectible diaphragm, saiddeiiectible stop device com prising a series of movable sections adaptedto be adjust-ed to provide an abutment conforming substantially to theshape of said diaphragm when the latter is deflected, and means for adjlisting said sections said means including' an adjusting rod surroundedby and fitted to said sections.

6. 'il governing device comprising a housing provided With a pumpchamber, means for forcing fluid from said chamber, a defiectiblediaphragm exposed to said pump chamber, the said 4diaphragm beingchangeable in shape in response to pressure exerted Vagainst fluidforced from the pump chamber, a deflcctible stop device for limiting themovements of said deflectible diajnhragm, an engine governor, and means,operable by said engine governor, for adjusting said deflectible stopdevice.

7. A governing device comprising a housing provided with a pump chamber,means for forcing fluid from said chamber, a deflectible diaphragmexposed to said pump chamber the said diaphragm being cl angeablc inshape in response to pressure exerted against fluid forced from the pumpchamber, a deflectible stop devicelfor limiting the movements of saiddeflectible diaphragm, said deflectible stop device being adapted to bedeflected to provide an abutment conforming substantially to the shapeof said diaphragm when the latter is deflected, a governor, and means,operable by said governor for adjusting said deflectible stop device. I

8. A governing device comprising a housing provided with a pump chamber,means for forcing fiuid from said chamber, a deflectible diaplira'gmexposed to said pump chamber, the said diaphragm being changeable inshape in response .to pressure exerted against fluid to lie-forced fromvthe pump chamber, a deflectible stop device, adjustable with relation tosaid diaphragm and adapted to change in shape during such adjustment toprovide anvadjustable diaphragm stop' conforming substantially to theshape of the diaphragm, an engine governor, and means, operable byv saidengine governor, for adjusting' said deflectible stop device.

9. i governing device comprising a housing provided with a pump chamber,means for forcing fluid from said chamber, a

dcflectible diaphragm exposed to said pump chamber, the said diaphragmbeing changeable in shape iu response to 'pressure exertec against iiuidforced from the pump chamber, a deflectiblestop device'comprisinginfleirible roclter members; an engine governor, and means, operable by'said engine governor, for adjusting said rocker members to limit themovements of said diaphragm.

l0.v di governing -devicecomprising a housing provided with a pumpchamber, means for forcing fluid from said chamber, a deflectiblediaphragm exposed to said pump chamberi the said diaphragm beingchange,-

\ able in shape in response to pressure exerted against fluid forcedfrom the pumpchambera substantially circular stop device comprising aseries of segmental stop members adapted to be deflected to provide anabutment conforming subst.antially to the shape of, and serving as astop for, said diaphragm when the latter is deflected, a governor, andmeans operable by said governor for adjusting said stop device.

ll. il governing device comprising a housing provided with a pumpchamber,

means for forcing fluid from said chamber, a

deflectible diaphragm exposed to said pump chamber, the said diaphragmbeing changeable in shape in response to pressure exerted against fluidforced fromthe pump chamber, a deflectible stop device for limiting themovements of said diaphragm, said deflectiblestop device comprising a`series of segmental members arranged together to pro-- duce asubstantiallycircular structure; an adjusting rod provided with anannular groove in which the inner ends of said segmental members areseated, and an engine governor associated with said adjusting rod ltomove the latter longitudinally, thereby deflccting said stop device.

l2. il governing device comprising a housing provided with a pumpchamber, means for forcing fluid from said chamber, a deflectiblediaphragm exposed to said pump chamber, the said diaphragm beingchangeable in shape in response to pressure exerted against fluid forcedfrom the pump chainber, a deiiectible stop device for limiting themovements of said diaphragm, said deflectible stop device comprising aseries of segmental members arranged to produce a substantially circularstii'ucture; an adjusting rod provided With an annular seat to which theinner ends of said segmental members are fitted, and an engine governorassociated with said adjusting rod to move the latter longitudinally,thereby dcflecting said stop device. 13. 'lhe combination of a housingcontaining a pump chamber, means for forcing iiuid from said chamber, adeflectible diaphragm exposed to said pump chamber,- the diaphragm beingchangeable in shape in response to pressure exerted in said pump diifilm

lllll l'lli chamber, a deiectibie stop device, adjustable with relationto said diaphragm and adapted to change in shape during adjustment toprovide an adjustable diaphragm stop convforming substantially `to theshape of said diaphragm, and a yieldable protector interposed betweensaid diaphragm and stop evice 14. The combination of a housing contain.

ing a pump chamber,. means for -iorcing fluid from said chamber, adeectibie diaphragm exposed to said pump chamber, the diaphragm beingVchangeable in shape in response to pressure exerted in said pumpchamber, a dee'etible stop device for limitphragm, said deectible stopdevice comprising a series of sectionsadjustable to provide an abutmentconforming. substantiaiiy to the vshape of the diaphragm when the latteris deected; and a yieldable protector interposed between said deectblediaphragm and saidstop device.

H. R. SETZ. In the presence of Y I i E. K. CLARK,

M. M. ALGAR. p

`15 ing the movements of said de ectible dia-

